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    Length: 3246 (0xcae)
    Types: TextFile
    Names: »valret.c«

└─⟦a0efdde77⟧ Bits:30001252 EUUGD11 Tape, 1987 Spring Conference Helsinki
    └─ ⟦this⟧ »EUUGD11/gnu-31mar87/scheme/microcode/valret.c« 

TextFile

/*	EMACS should recognize -*- C -*- code by itself.	*/

/****************************************************************
*                                                               *
*                         Copyright (c) 1986                    *
*               Massachusetts Institute of Technology           *
*                                                               *
* This material was developed by the Scheme project at the      *
* Massachusetts Institute of Technology, Department of          *
* Electrical Engineering and Computer Science.  Permission to   *
* copy this software, to redistribute it, and to use it for any *
* purpose is granted, subject to the following restrictions and *
* understandings.                                               *
*                                                               *
* 1. Any copy made of this software must include this copyright *
* notice in full.                                               *
*                                                               *
* 2. Users of this software agree to make their best efforts (a)*
* to return to the MIT Scheme project any improvements or       *
* extensions that they make, so that these may be included in   *
* future releases; and (b) to inform MIT of noteworthy uses of  *
* this software.                                                *
*                                                               *
* 3.  All materials developed as a consequence of the use of    *
* this software shall duly acknowledge such use, in accordance  *
* with the usual standards of acknowledging credit in academic  *
* research.                                                     *
*                                                               *
* 4. MIT has made no warrantee or representation that the       *
* operation of this software will be error-free, and MIT is     *
* under no obligation to provide any services, by way of        *
* maintenance, update, or otherwise.                            *
*                                                               *
* 5.  In conjunction with products arising from the use of this *
* material, there shall be no use of the name of the            *
* Massachusetts Institute of Technology nor of any adaptation   *
* thereof in any advertising, promotional, or sales literature  *
* without prior written consent from MIT in each case.          *
*                                                               *
****************************************************************/

/* File: VALRET.C
 *
 * This file contains a primitive which emulates an ITS valret
 * by stuffing the command into the keyboard buffer.
 *
 */

#include "scheme.h"
#include "primitive.h"
\f


#if (!defined(unix) || !defined(bsd))
#include "Error: Valret only works under BSD Unix"
#endif

#include <sys/ioctl.h>

void dump_buffer(command)
register char *command;
{ while (*command != '\0') ioctl(fileno(stdout), TIOCSTI, command++);
  return;
}

Define_Primitive(Prim_Valret, 1, "VALRET")
{ extern void Restartable_Exit();
  Primitive_1_Arg();

  Arg_1_Type(TC_CHARACTER_STRING);
  dump_buffer(((char *) Nth_Vector_Loc(Arg1, STRING_CHARS)));
  Restartable_Exit();
  return TRUTH;
}